1 files changed, 44 insertions, 0 deletions
diff --git a/chromium/ash/shell_observer.h b/chromium/ash/shell_observer.h
new file mode 100644
index 00000000000..060e30afc4b
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+++ b/chromium/ash/shell_observer.h
@@ -0,0 +1,44 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef ASH_SHELL_OBSERVER_H_
+#define ASH_SHELL_OBSERVER_H_
+
+#include "ash/ash_export.h"
+#include "ash/system/user/login_status.h"
+
+namespace aura {
+class RootWindow;
+}
+
+namespace ash {
+
+class ASH_EXPORT ShellObserver {
+ public:
+  // Invoked after the screen's work area insets changes.
+  virtual void OnDisplayWorkAreaInsetsChanged() {}
+
+  // Invoked when the user logs in.
+  virtual void OnLoginStateChanged(user::LoginStatus status) {}
+
+  // Invoked when the application is exiting.
+  virtual void OnAppTerminating() {}
+
+  // Invoked when the screen is locked (after the lock window is visible) or
+  // unlocked.
+  virtual void OnLockStateChanged(bool locked) {}
+
+  // Invoked when the shelf alignment in |root_window| is changed.
+  virtual void OnShelfAlignmentChanged(aura::RootWindow* root_window) {}
+
+  // Invoked when the projection touch HUD is toggled.
+  virtual void OnTouchHudProjectionToggled(bool enabled) {}
+
+ protected:
+  virtual ~ShellObserver() {}
+};
+
+}  // namespace ash
+
+#endif  // ASH_SHELL_OBSERVER_H_